Prestack Stolt residual migration Paul Sava* Stanford University Biondo Biondi Stanford University.

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Presentation transcript:

Prestack Stolt residual migration Paul Sava* Stanford University Biondo Biondi Stanford University

When is the velocity “correct”?

Motivation Why residual migration? image enhancement Why prestack? migration velocity analysis illumination Why Stolt residual migration? fast, robust

Agenda Prestack residual migration Examples Motivation Methodology

Prestack Stolt residual migration

Prestack & post-stack

Prestack Stolt residual migration Fourier-domain global action depth Velocity ratio (  Velocity ratio (no explicit velocity) Prestack

Agenda Prestack residual migration Examples Motivation Methodology

correct velocity incorrect velocity Example 1 residual migration

Example 2

Example 3 illumination or velocity?

original imageresidual moveoutresidual migration Example 3: comparison

before residual migration after residual migration Example 3

Summary Residual migration –Fourier-domain method –Prestack –No explicit knowledge of velocity Analogous to Stolt migration fast and robust global action

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